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ftdijtag: read must be done in pos edge

This commit is contained in:
Gwenhael Goavec-Merou 2020-01-18 17:50:26 +01:00
parent 0aaf9e31bd
commit fe97800106
1 changed files with 3 additions and 3 deletions
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6
ftdijtag.cpp
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@ -87,7 +87,7 @@ FtdiJtag::~FtdiJtag()
static unsigned char tbuf[16] = { SET_BITS_LOW, 0xff, 0x00,
SET_BITS_HIGH, 0xff, 0x00,
LOOPBACK_START,
MPSSE_DO_READ | MPSSE_READ_NEG |
MPSSE_DO_READ |
MPSSE_DO_WRITE | MPSSE_WRITE_NEG | MPSSE_LSB,
0x04, 0x00,
0xaa, 0x55, 0x00, 0xff, 0xaa,
@ -201,7 +201,7 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
unsigned char *tx_ptr = (unsigned char *)tdi;
unsigned char tx_buf[3] = {(unsigned char)(MPSSE_LSB | MPSSE_WRITE_NEG |
((tdi) ? MPSSE_DO_WRITE : 0) |
((tdo) ? (MPSSE_DO_READ | MPSSE_READ_NEG) : 0)),
((tdo) ? MPSSE_DO_READ : 0)),
static_cast<unsigned char>((xfer - 1) & 0xff), // low
static_cast<unsigned char>((((xfer - 1) >> 8) & 0xff))}; // high
@ -276,7 +276,7 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
display("%s move to EXIT1_xx and send last bit %x\n", __func__, (last_bit?0x81:0x01));
/* write the last bit in conjunction with TMS */
tx_buf[0] = MPSSE_WRITE_TMS | MPSSE_LSB | MPSSE_BITMODE | MPSSE_WRITE_NEG |
((tdo) ? MPSSE_DO_READ | MPSSE_READ_NEG : 0);
((tdo) ? MPSSE_DO_READ : 0);
tx_buf[1] = 0x0 ; // send 1bit
tx_buf[2] = ((last_bit)?0x81:0x01); // we know in TMS tdi is bit 7
// and to move to EXIT_XR TMS = 1